隐藏各 Activity 中的标题栏和系统的图标栏

1 隐藏系统的图标栏
在 setContentView(R.layout.activity_main); 之前增加:

1 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);  

就可以达到隐藏系统图标栏的目的。

2 隐藏应用中各 Activity 的标题栏
在 res\values 目录新建文件: style.xml,或在 styles.xml 中增加如下内容:

<style name="notitle">  
    <item name="android:windowNoTitle">true</item>  
</style>   

然后修改 manifest 文件中 theme 的行,修改后如下:

<application android:icon="@drawable/icon"   
    android:label="@string/app_name"   
    android:theme="@style/notitle">  

或,使用如下语句:

android:theme="@android:style/Theme.NoTitleBar">  

启动时直接出错,Log 如下:

10-15 14:18:51.282: D/AndroidRuntime(8833): Shutting down VM  
10-15 14:18:51.282: W/dalvikvm(8833): threadid=1: thread exiting with uncaught exception (group=0x4001b6a8)  
10-15 14:18:51.302: E/AndroidRuntime(8833): FATAL EXCEPTION: main  
10-15 14:18:51.302: E/AndroidRuntime(8833): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.hs.leozheng.phonelinkhs/com.hs.leozheng.phonelinkhs.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1734)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1753)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.app.ActivityThread.access$1500(ActivityThread.java:155)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:999)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.os.Handler.dispatchMessage(Handler.java:130)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.os.Looper.loop(SourceFile:351)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.app.ActivityThread.main(ActivityThread.java:3820)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at java.lang.reflect.Method.invokeNative(Native Method)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at java.lang.reflect.Method.invoke(Method.java:538)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:969)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:727)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at dalvik.system.NativeStart.main(Native Method)  
10-15 14:18:51.302: E/AndroidRuntime(8833): Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:110)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:99)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at com.hs.leozheng.phonelinkhs.MainActivity.onCreate(MainActivity.java:51)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1082)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1698)  
10-15 14:18:51.302: E/AndroidRuntime(8833):     ... 11 more  

另外,尝试修改代码,在 setContentView(R.layout.activity_main); 前增加如下所示的代码:

1 requestWindowFeature(Window.FEATURE_NO_TITLE);  

也一样没有效果。

以上两种方法(也可以说是三种)是网上提供的方法,但测试后都未达到目的。

最后在 CSDN 发帖子,得到了一种解决方法。帖子的地址:http://bbs.csdn.net/topics/390906636
是 android supportv_7 包里的 Appcompat 框架,来实现 Actionbar 对吧
对于这个包里的 ActionbarActivity,他在初始化的时候,会检查你的 theme,如果主题不是 Appcompat 的主题就会报错,你改一下主题形式,让他为:
Theme.AppCompat.Light 就好了
哪里看出来用v7的?Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

如果要隐藏掉 Actionbar, 就是用:

1 getSupportActionBar().hide();   

就好了。

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